import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
      home: Scaffold(
          appBar: AppBar(title: const Text('你好， flutter')),
          body: const Center(
            child: Text('2222111112',
                textDirection: TextDirection.ltr,
                style: TextStyle(color: Colors.red, fontSize: 40)),
          ))));
}
